Adaptation code for Prestashop validator
Update KwixoFrontController.php

$_SERVER['REMOTE_ADDR'] replaced by Tools::getRemoteAddr()

$cookie = Context::getContext()->cookie;
$cart = new Cart($cookie->id_cart);
replaced by
$cart = Context::getContext()->cart;

$customer_gender == $male_gender ? 'Monsieur' : 'Madame'
For Kwixo, if it's not a man it's automatically a woman
Update kwixo.php
Update KwixoFrontController.php
Update KwixoService.class.php
Update KwixoUrlCallFrontController.php
Update KwixoUrlSysFrontController.php
Update payment_return.php
Update push.php
Update sendtoKwixo.php
Update tagline.php
Update admin.tpl
Update tagline.tpl
Update KwixoOrderDetails.class.php
// Submodules updated
Merge branch 'master' of https://github.com/yanncyrille/PrestaShop-modules into yanncyrille-master
// Updated CONTRIBUTORS.md
// Submodules updated
// Updated CONTRIBUTORS.md
// Submodules updated